Sonnet 5.5 is now available in Cursor
Cursor says Sonnet 5.5 is now available and performs on par with Opus in many tasks.
#opus
View all AI newsArena.ai says Claude Opus 5.5 is easier to read than Opus 5 but writes longer answers
Arena.ai compared high-reasoning Text Arena outputs and says 10 of 12 writing measures moved in a better direction from Claude Opus 5 to Opus 5.5. Average answers grew from 453 to 481 words, while hedges such as “perhaps” rose 97%.
OpenClaw 2026.9.6 lists Opus 5.5, GPT-6 Sol/Luna, and Grok 4.7
The 2026.9.6 release also lists managed updates, restart recovery, 30-day usage, a GitHub reader, remote files, memory and skills, live meeting notes, and Jev with decision models. OpenClaw cites 2,614 pull requests and 351 contributors.